//package org.jim.core.utils;
//import java.lang.reflect.AccessibleObject;
//import java.lang.reflect.Array;
//import java.lang.reflect.Field;
//import java.lang.reflect.Modifier;
//import java.util.ArrayList;
//import java.util.Arrays;
//import java.util.List;
//
//
//import jdk.internal.reflect.ConstructorAccessor;
//import jdk.internal.reflect.FieldAccessor;
//import jdk.internal.reflect.ReflectionFactory;
//import org.jim.core.packets.Command;
//
//
//
///**
// *
// * 动态增加Enum枚举类字段;
// * @author WCHAO
// *
// */
//@SuppressWarnings("restriction")
//public class DynamicEnumUtil {
//
//   private static ReflectionFactory reflectionFactory = ReflectionFactory.getReflectionFactory();
//
//   private static void setFailsafeFieldValue(Field field, Object target, Object value) throws NoSuchFieldException,
//           IllegalAccessException {
//
//       // let's make the field accessible
//       field.setAccessible(true);
//
//       // next we change the modifier in the Field instance to
//       // not be final anymore, thus tricking reflection into
//       // letting us modify the static final field
//       Field modifiersField = Field.class.getDeclaredField("modifiers");
//       modifiersField.setAccessible(true);
//       int modifiers = modifiersField.getInt(field);
//
//       // blank out the final bit in the modifiers int
//       modifiers &= ~Modifier.FINAL;
//       modifiersField.setInt(field, modifiers);
//
//       FieldAccessor fa = reflectionFactory.newFieldAccessor(field, false);
//       fa.set(target, value);
//   }
//
//   private static void blankField(Class<?> enumClass, String fieldName) throws NoSuchFieldException,
//           IllegalAccessException {
//       for (Field field : Class.class.getDeclaredFields()) {
//           if (field.getName().contains(fieldName)) {
//               AccessibleObject.setAccessible(new Field[] { field }, true);
//               setFailsafeFieldValue(field, enumClass, null);
//               break;
//           }
//       }
//   }
//
//   private static void cleanEnumCache(Class<?> enumClass) throws NoSuchFieldException, IllegalAccessException {
//       blankField(enumClass, "enumConstantDirectory"); // Sun (Oracle?!?) JDK 1.5/6
//       blankField(enumClass, "enumConstants"); // IBM JDK
//   }
//
//   private static ConstructorAccessor getConstructorAccessor(Class<?> enumClass, Class<?>[] additionalParameterTypes)
//           throws NoSuchMethodException {
//       Class<?>[] parameterTypes = new Class[additionalParameterTypes.length + 2];
//       parameterTypes[0] = String.class;
//       parameterTypes[1] = int.class;
//       System.arraycopy(additionalParameterTypes, 0, parameterTypes, 2, additionalParameterTypes.length);
//       return reflectionFactory.newConstructorAccessor(enumClass.getDeclaredConstructor(parameterTypes));
//   }
//
//   private static Object makeEnum(Class<?> enumClass, String value, int ordinal, Class<?>[] additionalTypes,
//           Object[] additionalValues) throws Exception {
//       Object[] parms = new Object[additionalValues.length + 2];
//       parms[0] = value;
//       parms[1] = Integer.valueOf(ordinal);
//       System.arraycopy(additionalValues, 0, parms, 2, additionalValues.length);
//       parms[1] = parms[parms.length-1];
//       return enumClass.cast(getConstructorAccessor(enumClass, additionalTypes).newInstance(parms));
//   }
//
//   /**
//    * Add an enum instance to the enum class given as argument
//    *
//    * @param <T> the type of the enum (implicit)
//    * @param enumType the class of the enum to be modified
//    * @param enumName the name of the new enum instance to be added to the class.
//    */
//   @SuppressWarnings("unchecked")
//   public static <T extends Enum<?>> T addEnum(Class<T> enumType, String enumName, Class<?>[] additionalTypes, Object[] additionalValues) {
//
//       // 0. Sanity checks
//       if (!Enum.class.isAssignableFrom(enumType)) {
//           throw new RuntimeException("class " + enumType + " is not an instance of Enum");
//       }
//
//       // 1. Lookup "$VALUES" holder in enum class and get previous enum instances
//       Field valuesField = null;
//       Field[] fields = enumType.getDeclaredFields();
//       for (Field field : fields) {
//           if (field.getName().contains("$VALUES")) {
//               valuesField = field;
//               break;
//           }
//       }
//       AccessibleObject.setAccessible(new Field[] { valuesField }, true);
//
//       try {
//
//           // 2. Copy it
//           T[] previousValues = (T[]) valuesField.get(enumType);
//           List<T> values = new ArrayList<T>(Arrays.asList(previousValues));
//
//           // 3. build new enum
//           T newValue = (T) makeEnum(enumType, enumName, values.size(), additionalTypes, additionalValues);
//
//           // 4. add new value
//           values.add(newValue);
//
//           // 5. Set new values field
//           setFailsafeFieldValue(valuesField, null, values.toArray((T[]) Array.newInstance(enumType, 0)));
//
//           // 6. Clean enum cache
//           cleanEnumCache(enumType);
//           return newValue;
//       } catch (Exception e) {
//           e.printStackTrace();
//           throw new RuntimeException(e.getMessage(), e);
//       }
//   }
//
//
//   public static void main(String[] args) {
//
//	   System.out.println(Arrays.deepToString(Command.values()));
//       // Dynamically add 1 instance
//       addEnum(Command.class,"test60",new Class[]{int.class}, new Object[]{60});
//      // addEnum(Carrier.class,"test60",new Class[]{int.class,String.class, String.class}, new Object[]{60, "test60","CHINA"});
//       // Run a few tests just to show it works OK.
//       System.out.println(Arrays.deepToString(Command.values()));
//       System.out.println(Command.forNumber(1));
//      /* Command[] carriers = Command.values();
//       System.out.println(carriers[1].getId());*/
//   }
//
//
//}
